⑴一只鸡 ____ ⑵一只鸭子____
⑶一头牛 ____ ⑷一头猪____
世界上有许多城市布局在河边,主要是因为( )①河流是城市的主要水源②有利于发展水产品加工业 ③利用河道运输④利于排放废水
你会做下列加法题吗?
①What's six and one? It's ____.
②What's two and three? It's ____.
③What's zero and nine? It's____.
④What's four and three? It's____.
⑤What's one and five? It's____.
读澳大利亚图,回答问题。